Bonami Software Interview Questions, Process, and Tips

Q1. Rate yourself in js, node js, react, MongoDB (separately)
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Q2. Typeof null, typeof undefined, typeof {}, typeof NaN
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Q3. What changes came in es6
Ans. 
ES6 introduced several new features and improvements to JavaScript, making it more powerful and efficient.
• Arrow functions for more concise syntax

• Let and const for block-scoped variables

• Classes for easier object-oriented programming

• Template literals for easier string interpolation

• Default parameters and rest parameters for function arguments

• Destructuring assignment for easier data extraction

• Promises for asynchronous prog
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Q4. This keyword, closures, hoisting
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Q5. Are let and cont variables hoisted?
Ans. 
Yes, let and const variables are hoisted but not initialized.
• let and const variables are hoisted to the top of their block scope, but they are not initialized until the actual line of code is executed.

• This means that you cannot access a let or const variable before it is declared in the code.

• For example, trying to access a let variable before it is declared will result in a ReferenceError.
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Q6. What is global context
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Global context refers to the overall environment or setting in which something exists or operates.
• Global context encompasses all variables, functions, and objects that are accessible throughout an entire program.

• It can be thought of as the 'big picture' view of a program's execution.

• In web development, global context includes the window object in JavaScript.
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Q7. What is temporal deadzone
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Temporal dead zone is a period during the variable creation process where accessing the variable results in a ReferenceError.
• Occurs when trying to access a variable before it has been declared with let or const

• Happens due to the variable being in the temporal dead zone until it is declared

• Example: accessing a variable before its declaration will result in a ReferenceError
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Q8. What is modules? types of modules in nodejs
Ans. 
Modules in Node.js are reusable blocks of code that encapsulate related functionality.
• Modules in Node.js can be built-in modules like fs (file system) or third-party modules like express.

• Modules help in organizing code into separate files for better maintainability and reusability.

• Modules can be imported using the require() function in Node.js.
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Q9. Index in mongodb, why we need index, is index good or bad?
Ans. 
Indexes in MongoDB improve query performance by allowing the database to quickly locate and retrieve specific documents.
• Indexes help to speed up query performance by allowing the database to quickly locate specific documents based on the indexed fields.

• Without indexes, MongoDB would have to perform a collection scan, which can be slow and resource-intensive.

• Indexes can be created on single fields or compound fields to ...read more
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Q10. What are hooks , use of useRef
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Hooks are a feature in React that allow you to use state and other React features in functional components. useRef is a hook that allows you to create a mutable object that persists for the lifetime of the component.
• Hooks are used to add state and lifecycle methods to functional components in React

• useRef is used to create a mutable reference that persists between renders

• useRef can be used to access DOM elements directl
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Q11. Fs module, http module, worker thread?
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Q12. Why we use mongoose not mongodb driver?
Ans. 
Mongoose is an Object Data Modeling (ODM) library for MongoDB that provides a higher level of abstraction and simplifies interactions with the database.
• Mongoose provides schema validation which helps maintain data integrity.

• Mongoose simplifies querying and data manipulation with built-in functions.

• Mongoose supports middleware functions for pre and post processing of data operations.
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Coding test consist of 1 hr(Pallindrome, duplicate value, find the minimum number from the array)

Q1. What is Embedded development
Ans. 
Embedded development is the process of creating software that is embedded into hardware devices to control their functions.
• Involves programming microcontrollers or microprocessors

• Requires knowledge of hardware and software interactions

• Common in devices like smartphones, IoT devices, and automotive systems
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Q2. Which cable is used to transfer the data
Ans. 
Ethernet cable is commonly used to transfer data in networking applications.
• Ethernet cable is commonly used for wired internet connections

• USB cable is used for transferring data between devices like computers and smartphones

• HDMI cable is used for transferring audio and video data between devices like TVs and laptops
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Q3. Logical questions
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Basic Dsa Quetions like array or string

Q1. Basic JavaScript And ReactJs Interview Quetions
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Q1. Discussion on Experience
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Q1. Introduction and Sallary expectation Discussion
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First round was coding test. 4 coding questions were asked. Very basic string based questions were asked related to second most occurring character and sum and average of digits in given string. Functional composition based 2 questions.

Q1. This round was about technical discussion. They asked everything mentioned in resume like questions on HTML, CSS, JS, NodeJS, ExpressJS, ReactJS and MongoDB. Also asked questions on DBMS. As I had not stud...read more
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Q2. Output based questions on javascript
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Q1. Related to my web development learning process.
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